A Brockton man was shot in the chest on North Warren Avenue Monday night and suffered life-threatening injuries, police said.

Kaylen Scott, 26, of Brockton was smoking a cigarette outside 179 N. Warren Ave., Apt. 1, about 6:30 p.m. Monday when he was approached by three men and shot once in the upper left part of his chest, police said.

Witnesses told investigators they heard three or four shots fired, Lt. Robert Sergio said.

Three black males in their 20s were seen fleeing the scene after the shooting, witnesses told police. Sergio said they do not have any suspects at this time.

One of the suspects, who is about 5' 6", was seen holding a small black revolver and was jumping over a fence after the shooting, Sergio said.

The other two suspects, one with dreadlocks, wearing a red hooded sweatshirt and dark jeans and the other wearing a white shirt and khakis, were seen fleeing the driveway turning right down N. Warren.

Sergio said Scott was visiting people in the apartment at the time. When police arrived they saw shell casings on the ground and Scott laying on the floor of the apartment kitchen.

Scott was taken to a nearby hospital where he was stabilized and was then flown by helicopter to a Boston hospital, Sergio said. As of Tuesday morning Scott was still alive, Sergio said.

The State Police Crime Prevention and Control unit and State Police Homicide Unit were called to assist on the scene.